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    <p>Hello, I am trying to build ffmpeg for the Apple M1 with neon
      optimizations turned on.  This configure fails to enable neon or
      VFP.  MacOS / sdk 12.3.  I've tried the release 5.1 branch and
      master.<br>
    </p>
    <p><span style="font-family:monospace"><span
          style="color:#000000;background-color:#ffffff;">./configure
          --arch=arm64 --disable-everything --enable-pic --enable-neon
          --enable-optimizations --cpu=cortex-a8 --cc=/usr/bin/clang</span></span></p>
    <p><br>
      <span style="font-family:monospace"><span
          style="color:#000000;background-color:#ffffff;"><span
            style="font-family:monospace"><span
              style="color:#000000;background-color:#ffffff;">C compiler
                             /usr/bin/clang
            </span><br>
            C library                  <br>
            host C compiler           gcc
            <br>
            host C library             <br>
            ARCH                      aarch64 (cortex-a8)
            <br>
            big-endian                no
            <br>
            runtime cpu detection     yes
            <br>
            NEON enabled              no
            <br>
            VFP enabled               no
            <br>
            debug symbols             yes
            <br>
            strip symbols             yes
            <br>
            optimize for size         no
            <br>
            optimizations             yes
            <br>
            static                    yes
            <br>
            shared                    no
            <br>
            postprocessing support    no
            <br>
            network support           yes
            <br>
            threading support         pthreads
            <br>
            safe bitstream reader     yes
            <br>
            texi2html enabled         no
            <br>
            perl enabled              yes
            <br>
            pod2man enabled           yes
            <br>
            makeinfo enabled          yes
            <br>
            makeinfo supports HTML    no
            <br>
            xmllint enabled           yes<br>
            <br>
            <br>
          </span></span></span></p>
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